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### Question Asked by a Student from EXXAMM.com Team

** Q 1689101917. ** A car travels the first one-third of a certain

distance with a speed of `1 0` `km//h`, the next

one-third distance with a speed of `20` `km//h` and

the last one-third distance with a speed of

`60` `km//h`. The average speed of the car for the

whole journey is

**CDS 2015 Paper-1**